The image shows a set of metal hole saws and drill bits arranged on a white surface, with a black plastic carrying case open on the left. The hole saws are circular with serrated edges and various sizes, each attached to a cylindrical shaft. Two drill bits and a small metal tool are also visible at the bottom right. The image is framed within a black border.
A marketing image for the Klein hole cutter kit with callouts pointing to the integrated flange, split point pilot drill, and ejection spring.
The open Klein 8-piece carbide hole cutter kit, showing all six cutters and two extra pilot bits organized in their molded spots.
A close-up of one of the carbide hole cutters resting in its molded position within the black carrying case.
A close-up showing the two extra pilot bits with ejection springs resting in their molded slots in the carrying case.
The closed black plastic carrying case for the Klein Tools hole cutter kit, showing the handle and logo.
A worker in gloves opens the Klein carbide hole cutter kit on a utility cart, revealing all six cutters and pilot bits.
A close-up of a Klein carbide hole cutter with its ejection spring, chucked into a drill and ready for use.
A worker wearing gloves uses a drill with a Klein pilot bit to start a hole in a metal electrical box.
The image shows a set of metal hole saws and drill bits arranged on a white surface, with a black plastic carrying case open on the left. The hole saws are circular with serrated edges and various sizes, each attached to a cylindrical shaft. Two drill bits and a small metal tool are also visible at the bottom right. The image is framed within a black border.
A marketing image for the Klein hole cutter kit with callouts pointing to the integrated flange, split point pilot drill, and ejection spring.
The open Klein 8-piece carbide hole cutter kit, showing all six cutters and two extra pilot bits organized in their molded spots.
A close-up of one of the carbide hole cutters resting in its molded position within the black carrying case.
A close-up showing the two extra pilot bits with ejection springs resting in their molded slots in the carrying case.
The closed black plastic carrying case for the Klein Tools hole cutter kit, showing the handle and logo.
A worker in gloves opens the Klein carbide hole cutter kit on a utility cart, revealing all six cutters and pilot bits.
A close-up of a Klein carbide hole cutter with its ejection spring, chucked into a drill and ready for use.
A worker wearing gloves uses a drill with a Klein pilot bit to start a hole in a metal electrical box.
KLEIN TOOLS

Klein Tools Hole Cutter Set 31873 1/2 To 2 Inch Conduit 8-Piece Carbide Tipped Saw 3/16 Thick Stainless Steel Electrical Panel Metal Drilling Box Kit

In stock
SKU: 31873
$299.99 USD

Description

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Klein Tools 31873 8-Piece Carbide Hole Cutter Kit for 1/2" to 2" Conduit

The Klein Tools 31873 8-piece carbide hole cutter kit bores precise, burr-free conduit knockout holes across stainless steel, mild sheet steel, cast iron, copper, brass, and aluminum panels up to 3/16-inch (5 mm) thickness. Engineered with industrial-grade carbide cutting teeth that resist heat abrasion, each cutter incorporates an integrated safety collar flange that physically stops over-drilling to protect sensitive wiring and internal components. Outfitted with self-centering 135-degree split-point pilot drill bits to eliminate bit wandering and a heavy-duty rust-proof molded storage case, it equips commercial electricians, panel builders, and industrial maintenance technicians with fast, high-accuracy metal boring across portable drill chucks.

Best Used For:

  • Stainless Steel Electrical Enclosure Modifications: Boring clean 7/8-inch to 2-1/2-inch knockout holes in NEMA 4X stainless steel cabinets without edge discoloration or tooth dulling.
  • Commercial Conduit Rough-In Entry Drilling: Creating accurate conduit pass-throughs from 1/2-inch to 2-inch trade sizes in structural steel stud bays and junction boxes.
  • Industrial Machinery Control Panel Fabrications: Drilling precise push-button and wireway openings through thick copper busbars, brass plates, and mild sheet steel enclosures.

Key Performance & Safety Features

  • Heavy-Duty Carbide Tipped Teeth: Industrial carbide cutting edges maintain sharp cutting margins through tough stainless steel alloys and abrasive sheet metals.
  • Integrated Anti-Over-Drill Safety Flange: Built-in shoulder stop prevents the cutter from punching past the sheet metal wall, protecting internal wires and sub-panel components.
  • No-Walk Split-Point Pilot Bits: Precision 135-degree split-point pilot tips bite into metal surfaces immediately without skating, wandering, or requiring center punches.
  • 3/16-Inch Cutting Depth Capacity: Robust cutting cup geometry penetrates thick sheet metal, structural iron panels, and heavy-gauge electrical enclosures in a single pass.
  • Six Trade Conduit Diameter Sizes: Full coverage selection accommodates standard 1/2", 3/4", 1", 1-1/4", 1-1/2", and 2" trade conduit fitting dimensions.
  • Rust-Proof Molded Carrying Case: High-impact composite case features dedicated molded cavities to secure all six cutters and two spare pilot drill bits.

What's Included

  • (1) 7/8" (22.2 mm) Carbide Hole Cutter (for 1/2" Conduit)
  • (1) 1-1/8" (28.6 mm) Carbide Hole Cutter (for 3/4" Conduit)
  • (1) 1-3/8" (34.9 mm) Carbide Hole Cutter (for 1" Conduit)
  • (1) 1-3/4" (44.5 mm) Carbide Hole Cutter (for 1-1/4" Conduit)
  • (1) 2" (50.8 mm) Carbide Hole Cutter (for 1-1/2" Conduit)
  • (1) 2-1/2" (63.5 mm) Carbide Hole Cutter (for 2" Conduit)
  • (2) Extra High-Speed Split-Point Pilot Drill Bits
  • (1) Heavy-Duty Rust-Proof Molded Plastic Storage Case

Technical Specifications

Manufacturer Klein Tools Inc.
Model Number 31873
Product Classification 8-Piece Carbide Hole Cutter Set
Cutter Diameters Included 7/8 in, 1-1/8 in, 1-3/8 in, 1-3/4 in, 2 in, 2-1/2 in
Conduit Sizes Accommodated 1/2 in, 3/4 in, 1 in, 1-1/4 in, 1-1/2 in, 2 in Conduit
Maximum Material Thickness 0.1875 inches (3/16 in / 4.76 mm)
Cutting Edge Metallurgy High-Grade Tungsten Carbide Tipped Teeth
Over-Penetration Safety Stop Integrated Solid Steel Collar Flange
Pilot Bit Tip Style 135° Split-Point Non-Skate Pilot Drill
Total Kit Piece Count 8 Pieces (6 Cutters, 2 Extra Pilot Bits, Case)
Total Assembled Weight 4.30 lbs (1.95 kg)
Target Substrates Stainless Steel, Mild Steel, Iron, Copper, Brass, & Aluminum
Compatible Tool Platforms Standard 3/8" & 1/2" Corded & Cordless Power Drills

Pro-Tip: When cutting stainless steel enclosures, run your drill at a steady, moderate RPM and apply cutting wax or oil to the carbide teeth; keeping the cutting interface lubricated and cool prevents carbide fracturing and significantly extends tool life.